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Cholesterol oxidases, which catalyze the degradation of cholesterol to cholest-4-en-3-one, are widely used in the pharmaceutical and food processing industries. The cholesterol oxidase from Pimelobacter simplex (PsChO3) was transformed into E. coli BL21(DE3), but it was expressed mainly as inclusion bodies, and any soluble PsChO3 failed to bind to Ni-NTA resin. To overcome this obstacle, we devised...
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